Mars has a face, just like the rocky formation that resembles one in real-life, which works as an entrance to where the Native Martians live.

The Native Martians have bows that shoot lightsaber crystals.

Zapp throws a can of Slurm on the ground, making a Native Martian cry. This is a reference to an anti-littering campaign.

Zapp starts his negotiations by stating that if the Native Martians give Amy back, he will carve Earth’s Presidents into their sacred mountain. This is a reference to what Americans did to Native Americans with Mount Rushmore.